The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 1994
Filed:
Jun. 19, 1992
Eitaro Nakamura, Tokyo, JP;
Fumio Takano, Kawasaki, JP;
Nippon Zeon Co., Ltd., Tokyo, JP;
Abstract
A magnetic recording medium comprises a non-magnetic support on which is coated a magnetic layer. The magnetic layer contains a ferromagnetic powder dispersed in a binder. The binder comprises a styrene copolymer or an acrylic copolymer, respectively containing both of (i) an epoxy group and (ii) at least one hydrophillic group, such as a strong salt group or a tertiary ammonium salt group. The magnetic recording medium exhibits excellent recording density and S/N ratio, causes no environmental pollution, because of the absence of generation of hydrochloric acid on incineration of the magnetic recording medium for disposal after use. The magnetic recording medium is favorably utilized for magnetic tapes, magnetic sheets, magnetic discs and like products.